What does UN Regulation No. 105 cover?
UN Regulation No. 105, under the 1958 vehicle approval agreement, concerns specific constructional features of vehicles intended for dangerous goods transport. Its scope covers base vehicles in motor vehicle category N and trailer category O associated with ADR section 9.1.2.
The approval process concerns a vehicle type. Depending on the relevant designation and provisions, it addresses matters such as electrical equipment, braking and fire prevention. Technical requirements must be read for the particular configuration; a general description of a lorry as an ADR vehicle is insufficient evidence.
Type approval is different from the ADR vehicle certificate
ADR 2025, section 9.1.2.2, provides for recognition of relevant Chapter 9.2 construction requirements through UN Regulation No. 105 type approval, subject to the conditions stated there. This can support the individual vehicle's approval assessment.
The ADR certificate of approval under section 9.1.3 concerns an individual vehicle where required. For the designated vehicles covered by these provisions, ADR also requires annual technical inspection. A type approval mark alone does not demonstrate that this separate certificate is current or that the completed vehicle remains compliant.
Check the amendment series and transition rules
A verified recent amendment is the 07 series of amendments. The UN depositary notification of 6 October 2025 confirms adoption with effect from 26 September 2025 for Contracting Parties applying the regulation.
This date does not by itself determine whether an existing vehicle or approval is acceptable. Examine the relevant transitional provisions, approval date, subsequent supplements or corrections, and the rules applicable in the countries concerned. A consolidated revision may need to be read together with later amendments. Do not assume a new series automatically invalidates every earlier approval.
Assess the vehicle actually being used
A base vehicle's approval should be considered alongside its final body, tank or other equipment and any later modifications. Establish which organisation holds the technical evidence and whether changes affect the approval. Refer unresolved construction questions to the manufacturer, technical service or competent approval authority.
Separately, review the proposed goods, method of carriage and applicable ADR provisions. Vehicle approval does not replace classification, packaging or tank suitability, required equipment, driver qualifications or consignment documentation.
Prepare documents for a useful review
A practical review file starts with the vehicle identification number, registration, configuration and intended operation. Add the type approval communication and its extensions, the ADR vehicle certificate where applicable, inspection evidence and records of completion or modification. Check that these records describe the same vehicle and current configuration.
Keep certificate dates and limitations visible when planning work. DGSA advisory services can help identify transport requirements and documentation gaps. Contact DGSA with the vehicle documents and proposed operation so the review addresses the actual transport arrangement.